This study proposes an innovative precast shear wall system, called an EVE precast hollow shear wall structure (EVE-PHSW). Precast panels in EVE-PHSW are simultaneously precast with vertical and horizontal holes. Noncontact lap splices of rebars are used in vertical joints connecting adjacent precast panels for automated prefabrication and easy in situ erection. The seismic behavior of EVE walls was examined through a series of tests on six wall specimens with aspect ratios of 1.0∼1.3. Test results showed that EVE wall specimens with inside cast-in situ concrete achieved the desired “strong bending and weak shear” and failed in shear mode. Common main diagonal cracks and brittle shear failure in squat cast-in situ walls were prevented. Inside cast-in situ concrete could significantly improve the shear strength and stiffness of EVE walls. The details of boundary elements (cast-in situ or prefabricated) and vertical joints (contiguous or spaced) had little effect on the global behavior of EVE walls. Noncontact lap splices in vertical joints could enable EVE walls to exhibit stable load-carrying capacity through extensive deformations. Evaluation on design codes revealed that both JGJ 3-2010 and ACI 318-14 provide conservative estimation of shear strength of EVE walls, and EVE walls achieved shear strength reserves comparative to cast-in situ walls. The recommended effective stiffness for cast-in situ walls in ASCE 41–17 appeared to be appropriate for EVE walls.
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共查询到20条相似文献，搜索用时 453 毫秒
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钢-混凝土组合剪力墙抗震研究与发展 总被引：1，自引：0，他引：1
剪力墙是高层建筑抗震的主要抗侧力体系,随着大型复杂高层建筑的快速发展,对剪力墙抗震性能的要求也越来越高,钢-混凝土组合剪力墙就是一种抗震性能好的剪力墙。国内外在钢-混凝土组合剪力墙抗震研究方面,从抗震性能到设计方法和工程应用都取得了较快的发展。本文介绍了国内外有关钢-混凝土组合剪力墙抗震研究的部分成果,同时介绍了笔者提出的钢-混凝土多重组合剪力墙及其抗震研究情况,包括工程应用情况。已有研究表明:钢-混凝土组合剪力墙特别是钢-混凝土多重组合剪力墙,具有良好的抗震屈服机制和多道抗震防线,抗震耗能能力强,工程应用价值较大。 相似文献
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进行了3个1/3缩尺的中高剪力墙的抗震性能试验研究,包括1个混凝土中高剪力墙、1个内藏钢框架组合中高剪力墙和1个内藏钢桁架组合中高剪力墙。在试验研究基础上,对比分析了各剪力墙的刚度及其衰减过程、承载力、延性、滞回特性及破坏特征。试验表明:内藏钢框架混凝土组合中高剪力墙的抗震性能比普通混凝土中高剪力墙明显提高;内藏钢桁架混凝土组合中高剪力墙的抗震性能比普通混凝土中高剪力墙显著提高。 相似文献
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在大连国际会议中心核心筒墙体抗震设计中,采用了一种钢管混凝土叠合边框墙肢内藏钢板、连梁内藏钢桁架的组合双肢剪力墙。为研究其抗震性能,进行了1个1/7缩尺的这种新型组合双肢剪力墙模型的低周反复荷载试验,分析了其承载力、延性、刚度及其退化、滞回特性、耗能能力和破坏特征,重点研究了钢管混凝土叠合边框、墙肢内藏钢板、连梁内藏钢桁架之间的共同工作性能。研究表明:内藏钢板-钢桁架可显著提高钢管混凝土叠合边框双肢剪力墙的承载力和延性性能;钢管混凝土叠合边框可充分发挥其承载力高、不易开裂、延性好的优势。文中提出了该新型组合双肢剪力墙的承载力计算模型,计算结果与实测结果符合较好。 相似文献
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进行了1个1/7缩尺、剪跨比为2.0的带矩形钢管混凝土叠合柱边框内藏钢桁架深连梁联肢剪力墙模型的低周反复荷载试验。分析了该剪力墙的承载力、延性、滞回特性、耗能能力等抗震性能,研究了内藏钢桁架对该联肢剪力墙抗震性能的影响。试验研究表明:内藏钢桁架深连梁联肢剪力墙具有较好的延性;内藏钢桁架混凝土连梁对提高剪力墙的承载力及延性作用显著;带钢管混凝土叠合柱的翼墙可充分发挥钢管混凝土叠合柱抗压能力强、承载力高、不易开裂、延性好的优势;该新型组合剪力墙实现了"强墙肢、弱连梁"的延性屈服机制。 相似文献
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圆钢管混凝土边框内藏桁架剪力墙是一种新型组合剪力墙.为了解这种剪力墙的抗震性能,进行了 3个1/5缩尺试件的低周反复荷载试验.3个试件中,1个为圆钢管混凝土柱框架结构,1个为圆钢管混凝土边框-钢桁架结构,1个为圆钢管混凝土边框内藏钢桁架剪力墙.基于试验,对比分析了各试件的承载力、刚度及其退化过程、滞回特性、耗能能力及破... 相似文献
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钢筋混凝土开洞剪力墙结构抗震非线性有限元分析 总被引：6，自引：1，他引：6
本文以钢筋混凝土开洞剪力墙结构为研究对象，建立了该类结构动力非线性有限元分析计算及该类结构静力非线性pushover有限元分析计算的基本过程，并编制了相应的计算机程序．通过与实验分析结果的比较，检验了本文动力非线性有限元分析计算方法的准确程度，验证了静力非线性pushover有限元分析方法应用于开洞剪力墙抗震非线性性能评估的可靠性。 相似文献
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Panos Dakoulas 《Soil Dynamics and Earthquake Engineering》2012,34(1):11-24
The seismic behavior of tall concrete face rockfill dams in narrow canyons is investigated, based on numerical simulation of the staged construction, creep settlements, reservoir impoundment and seismic shaking of the dam. The study takes into account the flexibility of the canyon rock, the hydrodynamic effects and potential dynamic rockfill settlements. The static analysis uses a hyperbolic model for the rockfill, whereas the dynamic analysis uses a nonlinear hysteretic model, which accounts for the initial dynamic stiffness and produces hysteresis loops in agreement with the experimental data regarding the shear modulus and damping ratio. A damage plasticity model is used for the reinforced concrete, whereas frictional contact behavior is considered at the base and vertical walls of the concrete slab panels. An existing 150-m-high dam is used to investigate some key issues on the seismic behavior of such dams subjected to upstream−downstream and vertical excitation. Emphasis is placed on the evaluation of the tensile stresses within the slab panels, the compressive stresses at the slab-to-slab vertical interfaces and the opening of the joints. Moreover, the effect of potential dynamic settlements on both the slab stresses and joint openings is investigated. Recommendations for increasing the dam safety and reducing the water leakage through the dam body are given. 相似文献
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轴压比对中等高度LC结构剪力墙抗震性能的影响 总被引：2，自引：0，他引：2
轻骨料混凝土(L ight-we ight concrete,简称LC)剪力墙的轴压比是剪力墙抗震设计时一个重要的控制因素,直接关系到其延性性能。为使设计规程具有足够的理论依据,本文通过对六榀轻骨料混凝土剪力墙试件的试验,研究了在低周反复荷载作用下,着重考虑不同轴压比对中等高度有边框剪力墙的破坏形态和变形性能的影响效应,对其滞回特性进行分析,计算了各剪力墙的刚度退化率与延性系数,并将无竖缝剪力墙与带竖缝剪力墙的抗震性能进行了对比。 相似文献
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再生混凝土低矮剪力墙抗震性能试验研究 总被引：5，自引：0，他引：5
为了研究不同再生骨料取代率对剪力墙性能的影响,进行了4个剪跨比为1.0的低矮剪力墙的低周反复荷载试验研究,包括1个普通混凝土剪力墙和3个再生混凝土剪力墙.在试验的基础上,分析了各剪力墙的承载力、延性、刚度、滞回特征、耗能及破坏特征.研究表明:与普通混凝土剪力墙相比,再生混凝土低矮剪力墙的抗震性能略差,且随着再生骨料掺量的增加,再生混凝土剪力墙的性能呈下降趋势;暗支撑的设置能够明显改善再生混凝土低矮剪力墙的抗震性能;在一定的条件下,再生混凝土可用于一些剪力墙结构的抗震设计. 相似文献
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Reinforced concrete shear walls are used because they provide high lateral stiffness and resistance to extreme seismic loads. However, with the increase in building height, these walls have become slenderer and hence responsible of carrying larger axial and shear loads. Because 2D/3D finite element inelastic models for walls are still complex and computationally demanding, simplified but accurate and efficient fiber element models are necessary to quickly assess the expected seismic performance of these buildings. A classic fiber element model is modified herein to produce objective results under particular loading conditions of the walls, that is, high axial loads, low axial loads, and nearly constant bending moment. To make it more widely applicable, a shear model based on the modified compression field theory was added to this fiber element. Consequently, this paper shows the formulation of the proposed element and its validation with different experimental results of cyclic tests reported in the literature. It was found that in order to get objective responses in the element, the regularization techniques based on fracture energy had to be modified, and nonlinearities because of buckling and fracture of steel bars, concrete crushing, and strain penetration effects were needed to replicate the experimental cyclic behavior. Thus, even under the assumption of plane sections, which makes the element simple and computationally efficient, the proposed element was able to reproduce the experimental data, and therefore, it can be used to estimate the seismic performance of walls in reinforced concrete buildings. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
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钢筋混凝土核心筒体抗震性能试验研究 总被引：17，自引：5，他引：17
本文对两组五个钢筋混凝土核心筒试件进行了低周反复荷载试验，研究了不同轴压比和剪跨比的核心筒破坏机理、承载能力、延性和耗能能力等方面的抗震性能。结果表明，轴压比对核心筒的抗震性能有较大影响。 相似文献
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